/*
 * Copyright (c) [2016] [ <ether.camp> ]
 * This file is part of the ethereumJ library.
 *
 * The ethereumJ library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The ethereumJ library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the ethereumJ library. If not, see <http://www.gnu.org/licenses/>.
 */
package org.ethereum.validator;

import java.util.Arrays;

import org.ethereum.core.BlockHeader;
import org.ethereum.core.Genesis;

/**
 * Checks proof value against its boundary for the block header
 *
 * @author Shaolin Wu
 * @since 03/08/2018
 */
public class ProofOfElectionRule extends BlockHeaderRule {

	public ProofOfElectionRule() {
	}
	
    @Override
    public ValidationResult validate(BlockHeader header) {
    		if (Arrays.equals(Genesis.GENESIS_PID, header.getPresidentId())) {
			return Success;
    		}
        if (header.getRound() < 1) {
            return fault(String.format("#%d: the election round id %d is not correct!", header.getNumber(), header.getRound()));
        }
        if (header.getPresidentId() == null || header.getPresidentId().length == 0) {
            return fault(String.format("#%d: the election president id %d is not correct!", header.getNumber(), header.getRound()));
        }
        //TODO: verify whether is the right president packaged this block or not.
        return Success;
    }
}
